Bboachma-machilte



H. L. HANSON.

BROACHING MACHINE.

-APPucATIoN man APR.1o.1919.

.1,328,28 1 Patented Jan. 20, 1920.

2 SHEETS-SHEET I.

H. L. HANSON.

BROACHING MACHINE.

APPLICATION FILED APR. Io. I9I9.

Patented J an. 20,1920.

2 SHEETS-SHEET 2.

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flor/na f UNITED .STATES PATENT oruuon.

HENRY L. HANSON, OF WORCESTER, MASSACHUSETTS'.

BROACHING-MACHINE.

Application led April 10, 1919.

To all 'whom t may concern.'

Be it known that I, HENRY L. HANsoN, a citizen of the United States, residing at Vorcester, in the county of Vorcester and State of Massachusetts, have invented a new and useful Broaching-Machine, of which the following is a specification.

This invention relates to a machine for breaching, and although capable of general use is particularly adapted for the cutting of a slot through a small article.

The principal object of the invention is to provide a connection between the broach and broach holder of such a nature that the broach can be applied to the broach holderI by simply moving it transversely, preferably downwardly, into the same, no fastening means being required, and that it can be removed by the reverse action; also to provide this easy means of connecting and disconnecting the broach in such a location that the work with a broach in it can be applied to the machine as it nears one end of its stroke and the broach removed at the other end of the stroke and the work discharged, thus permitting of continuous operation of the machine without stopping at the end of the stroke to replace the work or broach or both as has been the case heretofore.

The invention also involves improvements in driving mechanism and means by which the machine can be stopped at the end of the stroke for use with green hands or while learning how to operate.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which- Figure 1 is a plan of a broaching machine constructed in accordance with this invention;

Fig. 2 is a side elevation;

Fig. 3 is an end view of the main frame with the broach-supporting device removed;

Fig. 4 is a sectional view on enlarged scale on the line 4-4 of Fig. 2, and

Fig. 5 is an end view of the work-holder and parts appearing adjacent thereto;

Although this invention is capable of use with many types of broaching machines I have shown it here as applied only to that type having a strong main frame 10 with a horizontal support 11 extending therefrom near the top. The power is applied in the form illustrated through a cone pulley 13 which isl connected by a clutch 14 with a Specification of Letters Patent.

Patented Jan. 20, 1920.

serial no. 288,987.

worm 15 driving a gear 16 on a shaft 17. On this shaft is a disk or arm 18 'pivotally connected with a connecting rod 19. This connecting rod is pivoted to a bifurcated slide 2O movable in iiXed guides 21 in the support l11. The connecting rod extends through the head 23 to a seat therein and can be removed merely by lifting it out.

The outer end of the support 11 is provided with a bearing surface at 26 which is vertical and on which are mounted V-shaped ways 27 for supporting the work W.

On the side of the support 11 there is a handle 30 pivoted on a stud 31 and having its opposite end engaging in a groove 32 in a link 33. This link is connected with a lever 34 pivoted on the frame 10 and that in turn is connected with a lever 35 below it which is connected with a rod 36 that has a dog 37 on it for throwing out the clutch 14. The lever 30 can be set in either operative or inoperative position. If set in inoperative position as shown in dotted lines in Fig. 2 it will throw out the clutch, but if turned in the opposite direction as shown in full lines it will hold the link 33 in clutching position until a pin 40 on the connecting rod engages the lever 34 each time the connecting rod 19 moves up to the end of its stroke to throw out the clutch and stop the machine. The handle 30 is used to start the machine. For continuous operation the pin 40 is simply removed.

In operation the pieces of work W are each provided with a broach and placed at a convenient point for the operator. With the handle 30 set in operative position the head 23 comes forward to the position shown in Figs. 1 and 2 and the operator takes a piece of work and broach and moves them down into the position shown in those figures just before the end of the stroke. As the wheel 16 continues to rotate and moves the slide back the broach pulls the work firmly up against the surface 26 and cuts the groove or notch. At the end of the stroke it is of course pulled through the work. The werk can be knocked off the ways 27 readily and the breach lifted eut and another breach and work made ready and put into place when the slide reaches.

the other end of its stroke. This eliminates the usual stopping of the machine and per mits of continuous operation. The drive is a convenient one for securing the desired power and permitting of this operation.

rlhe stopping means, as will be understood, is not ordinarily employed but is used when instructing a workman er in case the machine is to be operated by a green hand.

Although I have illustrated and described only a single form of the invention I am aware of the fact that modiiications can be made therein and that the invention can be applied to other types of breaching machines without departing from the scope of the invention as expressed in the claims.

Therefore I `de not wish to be limited in these respects, but what I do claim is 1. In a breaching machine, the cembination with a horizontal frame open at the top, and a horizontally reciprocatory slide, et means whereby a breach can be attached to, and detached :from the slide by a vertical motion through said open top, said means comprising a vertical T-shaped slet.

2. In a breaching machine, the combination with a reciprecatory slide having a T- shaped end, of a head having a T-shaped slot in each end, one slot receiving said end and the other for receiving the end of a breach.

3. In a breaching machine, the combination of a reciprocatory bifurcated slide, horizontal ways en which said slide is supported, a connecting rod extending along the bifurcation from the rear to the front of the slide at which peint it is pivoted thereto, and means on the slide for detachably holding a horizontal breach.

4L. In a breaching machine, the combination of an upright frame, an overhanging horizontal projection eXtending from the top thereof and having horizontal ways and open at the top above said Ways, a slide movable along said ways, a driving gear supported by said upright iframe, means -for reciprocating said slide from said gear, the projection having a vertical end surface, and a support for the work in front of said surface.

5. Ina breaching machine, the combination with a reciprecatory slide, ways on which said slide is supported, a connecting red extending along the slide and pivoted thereto, means on the slide for holding a breach, a worin, a worm wheel operated by 'the worm, an arm rotating with said wheel and pivoted to the connecting rod for operating it, a clutch for controlling the transmission of power to the worm, and detachable means for throwing the clutch out or action at the end of a complete reciprocation of the slide.

6. In a breaching machine, the combination with a reciprocatory slide, means on the slide for holding a breach, a worm, a worm wheel operated by the worm, a clutch for `controlling the transmission of power to the worm, detachable means for throwing the clutch out of action at the end of a complete reciprocation of the slide, comprising a pin mounted to move with the slide for operating the clutch, and means for operating the slide from said worm wheel.

In testimony whereof I have hereunto aiixed my signature.

HENRY L. HANSON., 

